Non-puncturable inner lining for automobile-tires.



C. S. GOODFELLOW.

NG FR AUTOMOBELE TIRES.

NON-PUNCTU APPLICATOH FltED OCT'. 19h-1.

atented Mm'. 19, 1918.-

CHARLES sIMnoN eooDFELLoW, or Jnnsnrr srry, new denser.

Nonfruno'ruaaern INNER LINING ron AUfroiaoBrLn-frnns.

Specification of Letters Patent. Patentedihail), 1918.

Application filed October 7, 1914. Serial No. 865,509.A i

To all 'zu/"wm t may concern.'

Be it `lrnown that I, CHARLES SIMEoN GooDFnLLow, a citizen of the United States of America, and a resident of Jersey City, in the county of Hudson 4and State ,of New Jersey, have invented certain new and useful improvements in Non-Puncturable inner innings for Automobile-Tires, whereof the following is a specification.

The object of this invention is to provide an inner lining impenetrable to the ordinary puncturin devices encountered on the road and vet su ciently flexible to yield to the inequalities of the roadbed.

Figure l of the accompanying drawings represents atransverse section of a wheel rim, a pneumatic tire mounted thereon, and an inner lining embodying this improvement disposed in said tire between the inner tube and the outer casing thereof.

Fig. 2 represents a4 perspective view of a fragment of this inner lining detached.4

Fig. 3 represents aplan View ofsorne of the parts of this inner lining as said parts vappear at one stage of the process of making said lining.

Fig. 4 represents'a section including all:

, the parts and ingredients entering into the lining assembled for vulcanization.

Fig. 5 represents a. section of the composite fabric of this inner lining after vulcanization.

Thesamereference numbers indicate cort.

responding parts in the different iigures.

An inner lining 10 of the drawings repre-.

sents an embodiment of this invention. This inner vlining is structurally independent of the other parts of the pneumatic tire and is -applicable to various forms thereof, including-those already in use as well as to new tires. The lining 10 is shown in Fig. 1 disposed Within a pneumatic tire between an outer clencher casing 2O and an inner tube 30, said tire-bcing mounted on a wheel rim 40.

This linin comprises two layers 11 and 111 composed o rawhide or equivalent material and an intermediate composite layer 15 composed of asbestos, aluminum and rubber, the whole being vulcanized together under heat and pressure.

in making the inner lining 10 a sheet of rawhide 11 is cut to a proper length and to a I proper width for the size of the vtire to be protected. The protective body of the sheet 11 is of suiiicient width to coverthe inner face of the outer casing 20 or so much thereof as may beinecessary .to' the .inner tube. This sheet 11 hasalon'g its opposite. edges integral attaching tlapsl?. andl which are preferably shaved down thinner.

than the protective body ottheshee-t.

Another sheet lliof rawhide or vsimilar material is cut to the properdength and of a width suiiicient to cover `the inner tubo 50 or so much thereof as may be necessary to guard against puncture,l .preferably .all the portion whichis outside thecircumference of the flanges4 41 and 42 of thegrim 40. .The wider sheet having the attaching aps is designed preferably to lie. against the inner 70 face of the casing 2O and the narrowersheet 14- is designed vpreferably tozlieagainst the A outer face of the inner tube, 30. f. 'f i After the rawhide f sheets are= thus. pre` pared, o neof them, preferably 'the sheet 11.1, is laid flat and a layer'16 of strands of asbestos is disposed thereon; then another layer 17 of strands of asbestos is laid over l the layer 16 crosswise thereof as shown in F 1g. Then powder or dust of aluminum 1s placed or sifted over said asbestos layers until a layer 18 of such aluminum is formed ,on top of the asbestos as indicated in Fig. 4.

This layer of aluminum may be of a thickness of a sixty-fourth of an inch, more or less. Then a thin sheet 19 of Para rubber, caoutchouc or other suitable india rubber, of a thickness of say a thirty-second of an inch, more or less, according to the tire with which the protector is to be used, is placed over the layer of aluminum. Then the rawhide sheet 14 is placed over the layero 1Para rubber. Then the layers of material thus assembled are placed in a vulcanizing mold and subjected to the process of vulcanization. rlhis may be effected under a temperature of 376 F., more .or less, and under a. pressure of sixty thousand-pounds to the 'square inch,

more or less. The vulcanization process requires from three to seven hours, more 3:10a

less, according to the thickness. of the material used. 4 l

'The vulcanization combines together into one composite layer 15 the various layers of asbestos, aluminum and Par. `rubber and 105 unites therewith the outer rawhide sheets 11 and 14. l i

In the application of the invention to a pneumatic tire suchias that shown in the drawings or its equivalent, the vulcanized `110 iieXible inner lining 10 is placed within the outer caslng 20 and its attaching aps4 12 and 13 liantr outside the circumferential open slot of said casing. Then the inner tube 30 in collapsed condition is passed through said slot between said iaps into said eas-fing. Then the tire is placed on the wheel rim 40 in the. usual manner`v care, bein e taken that (he flaps 12 and 13 are disposed between the attawhinglribs Q1 and 22 of the easing :20 and the fare of the rim 40, and when the easing has beads as 23 and 2l, tliexlapsl 1Q and 13 extend between them and lhe flanges -l1 and 42 of said rim. When the inner tube 30 is charged with air the liningr l() is lirmly clamped by its attaching flapsy 1'. and 13 between the outer casing u and the wheelrim 4() and the outer face ol' 'saiil inner tube lies against the inner lining 10. y

ln the use 0f this invention the inner lining 10 has' sulleiezit resistance to the usual pmu-turingr dm iees encountered along the road to prevent the penetration of the inner tube 3() and sullieient liexibilityto permit il to Yield witlrthe usual yielding of lhe pneumaticl tirerlothe inequalities` of the roadbed. In ease a nail or other device liable to cause a puneture, projects' through the. outer easing;r into contact with the lining Iand soft rubber,

10, the structure of the lining is such that. the nail cannot penetrate 1t. The nail pushes said lining inward for a .small area surrounding the point ot' Contact together with the inner tube, forming an inward bulge lherein without puneturing said tube. When the nail is pulled away from the outer casing l'he inner tube will resume its normal shape unimpaired.

l' claim as my invention: 1. A non-puncturahle inner lining for automobile tires comprisingr two Sheets of rawhide and an intermediate composite layer comprising asbestos, powdered aluminum all compress/ml and vulcanized together.

2. In a pneumatitl lire the combination of a tire easing, an inllating tube disposed therein, and a non-pmu-turable lining disposed 'between said tube and casing and comprising' layers' ol' rawhide and an intermediate composite layer otl asbestosl/ aluminum and soft' rubber all vulcanized together.

CHARLES SIMEON GOODFELLOW. "itnesses:

Janus N. ivritixsor,"v Wimimn A. GAYNon. 

